From: Fever in pregnancy and the risk of congenital malformations: a cohort study
N | N Cases | Congenital Malformations OR Crude [95% CI] | Congenital Malformations Adjusted* OR [95% CI] | |
---|---|---|---|---|
Fever | ||||
No | 69,023 | 2574 | 1 [Ref] | 1 [Ref] |
Yes | 8321 | 302 | 0.97 [0.86–1.10] | 0.99 [0.88 1.12] |
Gestational age at fever incidents | ||||
No fever | 69,023 | 2574 | 1 [Ref] | 1 [Ref] |
Pregnancy week 1–4 | 1032 | 43 | 1.12 [0.82–1.52] | 1.13 [0.83–1.54] |
Pregnancy week 5–8 | 3407 | 124 | 0.98 [0.81–1.17] | 0.99 [0.83–1.19] |
Pregnancy week 9–12 | 3882 | 135 | 0.93 [0.78–1.11] | 0.95 [0.79–1.13] |
Maximum temperature | ||||
No fever | 69,023 | 2574 | 1 [Ref] | 1 [Ref] |
< 39.0 ° C | 2613 | 108 | 1.11 [0.91–1.35] | 1.12 [0.91–1.36] |
≥ 39.0 ° C | 2562 | 98 | 1.03 [0.84–1.26] | 1.06 [0.86–1.30] |
Unknown | 3146 | 96 | 0.81 [0.66–1.00] | 0.82 [0.67–1.01] |
Duration of fever episode | ||||
No fever | 69,023 | 2574 | 1 [Ref] | 1 [Ref] |
1 day | 1647 | 55 | 0.89 [0.68–1.17] | 0.90 [0.69–1.18] |
2–3 days | 4799 | 180 | 1.01 [0.86–1.17] | 1.02 [0.88–1.19] |
+ 4 days | 1873 | 67 | 0.96 [0.75–1.23] | 0.98 [0.76–1.25] |
Unknown | 2 | 0 | .. | .. |